scholarly journals Numerical-Experimental Investigation into the Tensile Behavior of a Hybrid Metallic–CFRP Stiffened Aeronautical Panel

2020 ◽  
Vol 10 (5) ◽  
pp. 1880 ◽  
Author(s):  
Andrea Sellitto ◽  
Salvatore Saputo ◽  
Angela Russo ◽  
Vincenzo Innaro ◽  
Aniello Riccio ◽  
...  
Keyword(s):  
Damage Evolution ◽  
Composite Fiber ◽  
Hybrid Structure ◽  
Tensile Behavior ◽  
Stiffened Panel ◽  
Test Results ◽  
Fiber Reinforced Plastic ◽  
Reinforced Composite ◽  
Reinforced Plastic ◽  
Composite Stiffened Panel

In this work, the tensile behavior of a hybrid metallic–composite stiffened panel is investigated. The analyzed structure consists of an omega-reinforced composite fiber-reinforced plastic (CFRP) panel joined with a Z-reinforced aluminum plate by fasteners. The introduced numerical model, able to simulate geometrical and material non-linearities, has been preliminary validated by means of comparisons with experimental test results, in terms of strain distributions in both composite and metallic sub-components. Subsequently, the inter-laminar damage behavior of the investigated hybrid structure has been studied numerically by assessing the influence of key structural subcomponents on the damage evolution of an artificial initial debonding between the composite skin and stringers.

Finite Element Analysis of Top-Hat–Stiffened Panels of Fiber-Reinforced–Plastic Boat Structures

2007 ◽  
Vol 44 (01) ◽  
pp. 16-26
Author(s):  
Ömer Eksik ◽  
R. Ajit Shenoi ◽  
Stuart S. J. Moy ◽  
Han Koo Jeong
Keyword(s):  
Finite Element ◽  
Lateral Pressure ◽  
Three Dimensional ◽  
Element Model ◽  
Stiffened Panel ◽  
Element Analysis ◽  
Stiffened Panels ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Experimental Findings

This paper describes the development of a finite element model in order to assess the static response of a top-hat-stiffened panel under uniform lateral pressure. Systematic calculations were performed for deflection, strain, and stress using the developed model based on the ANSYS three-dimensional solid element (SOLID45). The numerical modeling results were compared to the experimental findings for validation and to further understand an internal stress pattern within the different constituents of the panel for explaining the likely causes of the panel failure. Good correlation between experimental and numerical strains and displacements was achieved.

Cracking behaviour of concrete beams reinforced with fiber reinforced plastic rebars

1996 ◽  
Vol 23 (6) ◽  
pp. 1172-1179 ◽  
Author(s):  
R. Masmoudi ◽  
B. Benmokrane ◽  
O. Chaallal
Keyword(s):  
Reinforced Concrete ◽  
Crack Width ◽  
Concrete Beams ◽  
Reinforcement Ratio ◽  
Test Results ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Concrete Members ◽  
Reinforced Plastic ◽  
Cracking Pattern

This paper presents the results of an experimental investigation on the cracking behaviour of concrete beams reinforced with fiber reinforced plastic rebars. The effects of reinforcement ratio on the cracking pattern, crack spacing, cracking moment, and crack width are investigated. The test results indicate that the reinforcement ratio has no meaningful effect on the cracking moment, which can be calculated as recommended by the ACI code. Also, the use of the equations adopted by ACI and the European codes for the prediction of crack width of conventionally reinforced concrete members is investigated and due modifications are made. Both relationships show good correlation with the test results; and the prediction of crack width of concrete beams reinforced with these two types of fiber reinforced plastic rebars is now possible. Key words: beam, cracking behaviour, cracking moment, crack width, fiber reinforced plastic, flexure, rebars, reinforced concrete, reinforcement ratio.

Study on the Mechanical Properties of Carbon Fiber Composite Material of Wood

2015 ◽  
Vol 1120-1121 ◽  
pp. 659-663
Author(s):  
De Jun Shen ◽  
Zi Sheng Lin ◽  
Yan Fei Zhang
Keyword(s):  
Carbon Fiber ◽  
Glass Fiber ◽  
Aramid Fiber ◽  
Polymerization Process ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Fiber Reinforced Plastic ◽  
Reinforced Composite ◽  
Glass Fiber Reinforced ◽  
Reinforced Plastic

through the use of domestic carbon fiber cloth and combining domestic fast-growing wood of Larch and poplar wood, the CFRP- wood composite key interface from the composite process, stripping bearing performance, Hygrothermal effect, fracture characteristics and shear creep properties to conducted the system research . Fiber reinforced composite (Fiber Reinforced Plastic/Polymer, abbreviation FRP) material by continuous fibers and resin matrix composite and its types, including carbon fiber reinforced composite (Carbon Fiber Reinforce Plastic/Polymer, abbreviation CFRP), glass fiber reinforced composite (Glass Fiber Reinforced Plastic/Polymer, abbreviation GFRP) and aramid fiber reinforced composite (Aramid Fiber Reinforced Plastic/Polymer, abbreviation AFRP). PAN based carbon fiber sheet by former PAN wires, PAN raw silk production high technical requirements, its technical difficulty is mainly manifested in the acrylonitrile spinning technique, PAN precursor, acrylonitrile polymerization process with solvent and initiator ratio. Based on this consideration, the subject chosen by domestic PAN precursor as the basic unit of the CFRP as the object of study.

Numerical Analysis on Mechanical Properties of Beams Reinforced by CFRP Laminates

2015 ◽  
Vol 744-746 ◽  
pp. 196-200
Author(s):  
Ning Zhuang ◽  
Hao Dong Sun ◽  
Song Ge
Keyword(s):  
Large Scale ◽  
Growth Failure ◽  
High Strength ◽  
Test Results ◽  
Cfrp Laminates ◽  
Fiber Reinforced Plastic ◽  
Four Point Bending ◽  
Reinforced Plastic ◽  
Low Weight ◽  
Cfrp Sheet

Carbon Fiber Reinforced Plastic (CFRP) has been widely used in large-scale concrete infrastructure’s reinforcement and renovation because of its low weight and high strength, which promotes CFRP application in the field of civil engineering. This paper two aged beams reinforced by CFRP sheet was loaded to failure in four-point bending by laboratory experiment. Then the numerical model was built to simulate the destruction process and compared with test results. Based on the studying of this paper, the changing law of beam’s stress, ultimate bearing capacity growth, failure mode and cracking propagation was investigated during the loading process. The research has guiding significance for the design and construction of concrete structures reinforced by CFRP laminates.

Grouted anchorages for aramid fibre reinforced plastic prestressing tendons

1993 ◽  
Vol 20 (6) ◽  
pp. 1065-1069 ◽  
Author(s):  
K. S. McKay ◽  
M. A. Erki
Keyword(s):  
Prestressed Concrete ◽  
Steel Tube ◽  
High Ratio ◽  
Aramid Fibre ◽  
Test Results ◽  
Structural Deterioration ◽  
Reinforced Composite ◽  
Reinforced Plastic ◽  
Aramid Fibres ◽  
Lateral Strength

Nonmetallic prestressing tendons, made of fibre-reinforced composite materials, are being proposed as alternatives to steel prestressing tendons for bridges and parking garage structures, where corrosion is the leading cause of structural deterioration. One type of commercially available nonmetallic tendons is made of pultruded aramid fibres. One of the main problems for these tendons, which is common to all nonmetallic tendons, is that the high ratio of the axial to lateral strength of fibre-reinforced materials requires special attention to the type of anchorage used. For the aramid tendon, the simplest grouted anchorage consists of a steel tube filled with nonshrink grout, into which the end of the tendon is embedded. This note presents the test results of a parametric study on grouted anchorages for pultruded aramid tendons. Key words: prestressed concrete, nonmetallic tendons, aramid fibre, grouted anchorage.

scholarly journals Novel form-flexible handling and joining tool for automated preforming

2015 ◽  
Vol 22 (2) ◽  
pp. 199-213 ◽  
Author(s):  
Holger Kunz ◽  
Christian Löchte ◽  
Franz Dietrich ◽  
Annika Raatz ◽  
Fabian Fischer ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Material Selection ◽  
Production Method ◽  
Test Results ◽  
Fiber Reinforced Plastic ◽  
Level Of Automation ◽  
Reinforced Plastic ◽  
High Degree ◽  
Fiber Preforms ◽  
Heating Technology

AbstractThe production rates of carbon fiber reinforced plastic (CFRP) parts are rising constantly which in turn drives research to bring a higher level of automation to the manufacturing processes of CFRP. Resin transfer molding (RTM), which is seen as a production method for high volumes, has been accelerated to a high degree. However, complex net-shape preforms are necessary for this process, which are widely manually manufactured. To face these challenges a new concept for the manufacturing of carbon fiber preforms with a form-flexible gripping, draping and joining end-effector is presented and discussed. Furthermore, this paper investigates the application of this concept, describes the initial build-up of a demonstrator, focusing on material selection and heating technology, and discusses test results with the prototype. This prototype already validates the feasibility of the proposed concept on the basis of a generic preform geometry. After a summary, this paper discusses future in-depth research concerning the concept and its application in more complex geometries.

Failure mode–driven quality analysis of operational risks for composite fiber-reinforced plastic assembly

2017 ◽  
Vol 233 (1) ◽  
pp. 267-277 ◽  
Author(s):  
John PT Mo ◽  
Bathmarajah Suparayan
Keyword(s):  
Failure Mode ◽  
Failure Modes ◽  
Risk Mitigation ◽  
Composite Fiber ◽  
Poor Quality ◽  
Quality Analysis ◽  
Assembly Process ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic

Composite fiber-reinforced plastic products have many failure modes in the manufacturing stage. The cost of rework is high. To ensure a reliable manufacturing process and outcome, this article presents a new method to prioritize assembly process errors according to a risk-based cost of poor quality. The method combines a range of reliability techniques including cause–effect diagram, fault tree, and analytic hierarchy process to achieve multiple failure mode assessment. The outcome of this research provides direct links to develop risk mitigation plans to treat the prioritized risks of production errors in the composite fiber-reinforced plastic assembly process.

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